1974 Mazda 929 vs. 2007 Opel Astra
To start off, 2007 Opel Astra is newer by 33 year(s). Which means there will be less support and parts availability for 1974 Mazda 929. In addition, the cost of maintenance, including insurance, on 1974 Mazda 929 would be higher. At 1,769 cc (4 cylinders), 1974 Mazda 929 is equipped with a bigger engine. In terms of performance, 2007 Opel Astra (100 HP @ 4400 RPM) has 17 more horse power than 1974 Mazda 929. (83 HP @ 5000 RPM) In normal driving conditions, 2007 Opel Astra should accelerate faster than 1974 Mazda 929. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Astra weights approximately 295 kg more than 1974 Mazda 929. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2007 Opel Astra (240 Nm @ 2300 RPM) has 106 more torque (in Nm) than 1974 Mazda 929. (134 Nm @ 3000 RPM). This means 2007 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 1974 Mazda 929.
Compare all specifications:
| 1974 Mazda 929 | 2007 Opel Astra | |
| Make | Mazda | Opel |
| Model | 929 | Astra |
| Year Released | 1974 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 1769 cc | 1686 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 83 HP | 100 HP |
| Engine RPM | 5000 RPM | 4400 RPM |
| Torque | 134 Nm | 240 Nm |
| Torque RPM | 3000 RPM | 2300 RPM |
| Engine Bore Size | 80 mm | 79 mm |
| Engine Stroke Size | 88 mm | 86 mm |
| Engine Compression Ratio | 8.6:1 | 18.4:1 |
| Fuel Type | Gasoline | Diesel |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 3 doors |
| Vehicle Weight | 1070 kg | 1365 kg |
| Vehicle Length | 4550 mm | 4300 mm |
| Vehicle Width | 1670 mm | 1760 mm |
| Vehicle Height | 1420 mm | 1440 mm |
| Wheelbase Size | 2520 mm | 2620 mm |
| Fuel Tank Capacity | 55 L | 52 L |
